hi Ron, In the 11 plant garden i understand that the
pump goes on for 30 minute and off for 30 minutes around the clock. When the pump is on is since the garden is over the tank ,you pump the water into the garden and the excess of water goes through the overflow back to the tank, When the pump is off does the water back-down through the pump to get back to the tank with gravity or it stays in the garden ????? Is it OK to use an external pump (i got a pump from an old soda carbonator, type restaurant use in post mixt to put co2 in pepsi) ?